how do i remove this link on my website ?

i want to remove this link , is linked on my website ?

You need to find the pages or posts where this link is and remove them. Use a plugin link whisper to find those pages or posts. You also wanna do a malware scan, use word fence plugin. It has free scanner. If your site is hacked then best option is revert back to the last backup of site that us malware free. Patch all vulnerabilities like remove nulled plugins, fix any file folder permission issues.